Knowledge Management plunged 1 3/4p to 2p after warning that second-half revenues will be lower than expected, meaning that full-year revenues will be significantly below current market estimates.

A profit warning sent Baldwins Industrial Services 5p lower to 14p. The company said pretax losses for the year to March will be at least £7.6m because of disappointing trading conditions.

DCS was also weak on poor prospects, warning that it's the computer services environment continues to be challenging, with no evidence in any of its businesses of a sustained recovery in market conditions. The shares fell 9p to 26p.

Fulcrum Pharma was another loser after it announced it intended to raise £3.25m through a share placing. Investors seemed unimpressed by its assertion that profits will continue to rise as it reported an increase in first-half pretax figures of £422,000 against £127,000 last time. Fulcrum's shares fell 1 1/4p to 14p.